> End-to-end encryption doesn't seem to impact whether law enforcement can look backwards in time or not. I think he was referring to the fact that the Signal

> End-to-end encryption doesn't seem to impact whether law enforcement can look backwards in time or not. I think he was referring to the fact that the Signal protocol has perfect forward secrecy -- if you break the key today, all previous communications are still secure because they used different keys (the key is updated using the Axolotl ratchet).